family Esocidae vs fish family

family Esocidae and fish family both are nouns.

Word	Noun	Adjective	Verb	Adverb
family Esocidae	Yes	No	No	No
fish family	Yes	No	No	No

As nouns, fish family is a hypernym of family Esocidae; that is, fish family is a word with a broader meaning than family Esocidae:

family Esocidae (noun)	fish family (noun)
pikes; pickerels; muskellunges	any of various families of fish